ITEM NAME:E18-D80NK Infrared Photoelectric Switch Sensor Obstacle Avoidance Sensor Modu Kw.1 x E18-D80NK Arduino Infrared Reflectance Sensor. The standard test objects: below the sun 10000LX incandescent 3000LX following. Lead length: 16cm/6.3". Size: 4.8x2.2cm/1.89x0.87". Sn: 3-80cm/1.18-31.5".